The Welsh cop who caged serial killer Peter Moore has broken his silence over the murderer’s latest bid for freedom.

In an exclusive interview with Wales on Sunday former Detective Constable Dave Morris said Moore must die in jail because he’s too dangerous ever to be set free.

Moore and two other murderers took their court battle against “whole-life” jail terms to the highest level of the European Court last month, arguing the indefinite sentence breaches their human rights.

Former North Wales cop Morris, who arrested Moore in 1995, said: “The guy is a dangerous man and until he can prove that he’s safe to be released into society we can't consider a release date.

“In my career I was a detective for the best part of 25 years and he was the most dangerous man I came across as a police officer.

“I don't think (he could ever be safe to be released). I’ve not really had any contact with him for 10 years and I’m speaking historically, but from my knowledge he’s a man who can't really be released back into society.”

Gay cinema owner Moore, 66, from Kinmel Bay, Conwy, murdered four men over four months in 1995, and was dubbed the “most dangerous man in Wales” by the judge at his trial the following year.

That hearing was told how he butchered Henry Roberts, Edward Carthy, Keith Randles and Tony Davies to satisfy his perverted sexual urges.

The judge recommended that Moore was among the most dangerous group of killers who should never be let out, a decision upheld at the time by Welsh-born Home Secretary Michael Howard.

Sadist Moore’s wardrobe had “strong Nazi influences” – and he was dubbed “the man in black” at his trial because he would wear dark leather when lurking at gay cruising spots.

His killing spree began in September 1995 with the stabbing of retired railway worker Roberts, 56, a neo-Fascist who lived in semi-isolation amid his own and his dog’s waste in a cottage in Caergeiliog, Anglesey.

Moore’s next victim Carthy, 28, was stabbed and buried in Clocaenog Forest, near Ruthin, after he met the killer at a gay bar in Liverpool in the October.

Around a month later traffic safety manager Randles, 49, met his death at the point of Moore’s black-handled knife as he slept in his caravan at Mona, Anglesey.

Moore’s last victim Davies, 40, was stabbed on December 18, at Pensarn Beach, North Wales, a gay cruising area.

Next page: Trial

At his trial the jury was told how Moore’s violence was caused by anger at his own sexuality.

Moore, who killed for ‘fun’, would take pleasure in his encounters with other gay men before attacking them.

Morris, who retired from North Wales Police last year and now investigates waste offences for Environment Agency Wales, was unimpressed by Moore’s argument his human rights are being violated.

Bamber was convicted of murdering his adoptive parents, sister and her two young children in 1985.

Vinter was caged for stabbing his wife in February 2008, having already served nine years for knifing to death a work colleague in 1996.

The European Court of Human Rights backed UK judges last January in a narrow 4-3 majority vote, saying it was not “grossly disproportionate” for the country’s notorious criminals to be jailed indefinitely.

But then the three murderers took it to the 17-judge Grand Chamber of the European Court of Human Rights, which is the last chance for their appeal.

Morris, 51, added: “That’s his grounds (that it's an abuse of his human rights) and the court will make a decision on that in due course. They have made a decision on it earlier this year and the next court will consider that court’s decision.

“Justice will run its course. For a court not to give a date of release to a prisoner is an extreme measure. It’s a big call to be made, but it has to be made with a lot of consideration.”